Tryweryn is a river located in Wales, flowing through the Snowdonia National Park. It is known for its scenic beauty and is a popular spot for outdoor activities such as kayaking and fishing. The river is part of the larger River Dee catchment area. The river gained historical significance in the 1960s when the village of Capel Celyn was flooded to create a reservoir, leading to significant controversy and protests. This event highlighted issues of water rights and cultural preservation in Wales, making Tryweryn a symbol of local identity and resistance.